Fuel Injector
Maintenance / Disassembly and reassembly
A5.05. 07.07.01.00
M20
en / 31.05.2010 IB022247 2/3
07
1.6 Screw extractor (Fig. 2/W1) onto adjusting
screw (13) of the nozzle holder (14). Turn
up nozzle holder from the seat against the
flange (12).
1.7 Pull fuel injector at eye bolt (W1) out of the
cylinder head.
1.8 Remove the soft iron sealing ring (17).
Clean bore and nozzle seat (16) in the
cylinder head.
1.9 Clean the outside of the fuel injector and
carry out function check of the injection
nozzle (07.08.01 nn).
1.10 Renew the soft iron sealing ring (17) and
all of the O-rings (18).
2. Reassembly
2.1 Apply a thin film of Molykote paste on
the threads of gudgeons (Fig. 2/11), O-
rings.
Excessive paste has to be removed!
Through excessive paste there is the
risk of squeezing of the O-rings in the
locking groove in the cylinder head!
Grease the soft sealing ring (17) and
nozzle (16) with high temperature thread
paste to avoid sticking due to heat.
2.2 Insert injection carefully valve into cylinder
head. Attach flange (Fig. 2/12) and tighten
nuts (15) with torque
M = 55 Nm.
2.3 Slacken nuts (15) again by one turn.
2.4 Push in the radial thrust piece (Fig. 1/5).
2.5 Fit the transverse thrust piece (3).
CAUTION
Only use original MaK spare
parts.
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